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Finding the Fourth Proportional to 66,388.35, 91,614.77 and 36,173.92

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Solution

The fourth proportional to 66,388.35, 91,614.77 and 36,173.92 is: 49,919.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,388.35 : 91,614.77 = 36,173.92 : x
  2. Step 2: Convert to fraction form
    66,388.35/91,614.77 = 36,173.92/x
  3. Step 3: Cross multiply
    66,388.35x = 91,614.77 × 36,173.92
  4. Step 4: Simplify right side
    66,388.35x = 3,314,065,360.80
  5. Step 5: Solve for x
    x = 3,314,065,360.80/66,388.35
  6. Step 6: Final answer
    x = 49,919.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.